Question

What is the meaning of functional dependencies in dbms?

Answer 1

Functional dependency in DBMS. The attributes of a table is said to be dependent on each other when an attribute of a table uniquely identifies another attribute of the same table. For example: Suppose we have a student table with attributes: Stu_Id, Stu_Name, Stu_Age

Answer 2

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A functional dependency occurs when one attribute in a relation uniquely determines another attribute. This can  be written A -> B which would be the same as stating "B is functionally dependent upon A."